CN102951633A - Graphite spheroidization method and production system thereby - Google Patents
Graphite spheroidization method and production system thereby Download PDFInfo
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- CN102951633A CN102951633A CN2012104747927A CN201210474792A CN102951633A CN 102951633 A CN102951633 A CN 102951633A CN 2012104747927 A CN2012104747927 A CN 2012104747927A CN 201210474792 A CN201210474792 A CN 201210474792A CN 102951633 A CN102951633 A CN 102951633A
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Abstract
The invention discloses a graphite spheroidization method and a production system thereby. The method comprises the following three steps of: (1) ultra-fine pulverizing, namely pulverizing graphite to a proper granularity by utilizing an ultra-fine high-energy pulverizer; (2) reshaping treatment, namely performing reshaping treatment on the pulverized graphite by utilizing a batch-type or continuous reshaping system consisting of one or more special reshaping devices and a micro-nano particle reshaping cladding system; and (3) ultra-fine multilevel classification, namely performing high-precision multilevel series classification on the graphite subjected to reshaping treatment by utilizing an ultra-fin multilevel classification system, so as to obtain narrow granular spherical graphite with the D50 of 3-35mu m. The method and the system haves the following advantages: the product spheroidization effect is good, the tap density is large, the yield of finished products is high, a favorable reshaping effect can be achieved for artificial graphite which is difficult to reshape, the preparation period is short, the processing equipment is compact, and the method is safe and environmentally-friendly.
Description
Technical field
The present invention relates to natural graphite and electrographite material are carried out the method that spheroidization is processed, especially cathode of lithium battery is carried out physics shaping methods and the related production system that spheroidization is processed with synthetic graphite and crystalline flake graphite material.
Background technology
Graphite material is with its good electroconductibility, good charging/discharging voltage platform, higher specific storage and source widely, and dominate always in lithium ion battery negative material becomes the study hotspot of negative material.Lithium cell mainly is divided into natural graphite and synthetic graphite with graphite material.Natural graphite is take crystalline flake graphite as main, and synthetic graphite comprises needle coke, refinery coke, carbon nanotube and carbonaceous mesophase spherules etc.Two kinds of graphite is because of the impact of formation condition and complete processing, and material structure is different, causes material property that larger difference is also arranged.Compare with synthetic graphite, the natural graphite specific storage is large, technique is simple, price is relatively low, but poor stability, high rate performance are not good, the electrolytic solution bad adaptability.For cyclical stability and the tap density that improves graphite, industrial natural graphite is done globulate or subsphaeroidal, but because being subjected to its preparation technology's restriction, cause that product yield is low, energy consumption is large, cost is high, and the sphericity that makes spherical graphite is not high, and the performance of product is undesirable.Synthetic graphite (except the carbonaceous mesophase spherules) is because hardness is larger, and easily the artificial body for generating accumulated powder is broken in the spheroidization process, and existing installation and technique are difficult to do globulate.
At present, domestic graphite spheroidization equipment is mainly the eddy current mill, the shaping device that does not have specialty, shaping mechanism mostly is the impact shaping, graphite granule will be smashed if surging force is excessive, cause productive rate to reduce, and not good for larger this equipment shaping effect of synthetic graphite of hardness, can only play porphyrization.Although other equipment that graphite is carried out shaping is arranged abroad, expensive, still not good to the shaping effect of electrographite.
Summary of the invention
The objective of the invention is provides a kind of complete processing and provides the required production system of this technique for improving natural graphite and electrographite spheroidization effect and product yield.
To achieve these goals, the present invention adopts following technical scheme:
A kind of graphite spheroidization method and production system thereof, the method may further comprise the steps:
(1) subtle powder smash
Utilize ultra tiny efficient pulverizing system that natural or electrographite are crushed to D50 and be the size-grade distribution of 1-35 μ m;
(2) Shape correction
1. batch Shape correction: the natural or electrographite after superfine grinding is dropped into a micro-nano granules shaping encasing system, under engine speed 100-9000rpm, process after 5-30 minute, obtain the natural or electrographite of spheroidization; Or
2. continuous Shape correction: through the natural or electrographite after the superfine grinding by the feeding coal of feeding machine at 50-200kg/h under in the continuous orthopedic systems that is composed in series by 2-15 platform micro-nano granules shaping encasing system of input, under engine speed 100-9000rpm, carry out shaping, the natural or electrographite after the discharge port of orthopedic systems obtains shaping continuously;
(3) ultra tiny multistage classification
To carry out the multistage series classification of high precision in ultra tiny multistage hierarchy system through the natural or electrographite after the shaping, obtaining D50 is the narrow grade spherical graphite of different specified particle diameter series among the 3-35 μ m.
Described natural graphite is natural scale kish.
Described electrographite comprises needle coke, refinery coke, carbon fiber, carbon nanotube and carbonaceous mesophase spherules.
Described ultra tiny Highefficientpulverizer comprises eddy current mill, vibration mill, ball milling and airflow milling.
Described suitable size-grade distribution is that D50 is 1-35 μ m.
Described micro-nano granules shaping encasing system is a kind of equipment that can carry out to micro-nano granules shaping and physics coating by the exploitation of the prosperous new forms of energy in Zhejiang company limited, the shaping principle of this equipment comprises impacts shaping and two kinds of the shapings that rub, and the intensity of impact and friction shaping can be controlled by regulating engine speed and circulation passage.
The rotating speed of described micro-nano granules shaping encasing system main frame can be regulated in 100-9000rpm.
Described ultra tiny multistage hierarchy system comprises that by the 2-7 platform grading machine of Jet Classifier for Super, centrifugal classifier, eddy current type grading machine and rotor-type grading machine forms by serial or parallel connection.
The graphite spheroidization method that the present invention provides can be realized by successive type graphite spheroidization system or batch type graphite spheroidization system, and two kinds of production systems all are fully airtight.Two kinds of production systems all comprise batch type that ultra tiny efficient pulverizing system, one or more micro-nano granules shaping encasing system form or successive type orthopedic systems, high precision hierarchy system, grading gathering system.The outlet of ultra tiny efficient pulverizing system is communicated with micro-nano granules shaping encasing system entrance, micro-nano granules shaping encasing system outlet is connected with the entrance of high precision hierarchy system, and the macrobead outlet of collecting in the grading gathering system is passed through pipeline or helical feed and linked to each other with the entrance of ultra tiny efficient pulverizing system.
The advantage of preparation spherical graphite of the present invention is: the product spheroidization is effective, tap density is large, finished product yield is high, for the synthetic graphite that is difficult to shaping splendid shaping effect is arranged also, and preparation cycle is short, and processing units is compact, safety and environmental protection.
Embodiment
Embodiment 1:
This example utilizes batch type graphite spheroidization system that natural graphite is carried out spheroidization and processes, and produces four kinds of products that D50 is respectively 5,10,15,20 μ m.
With the ultra tiny efficient pulverizing of 50kg natural graphite (100 order) input system, it is 23 ± 2 μ m that regulation system pulverizing parameter makes the D50 of discharging, graphite enters first surge bunker after pulverizing, by the automatic weighing system in first surge bunker, with the graphite after the 10kg pulverizing, drop into micro-nano granules shaping encasing system, after engine speed is to process 5min under the 4500rpm, enter second surge bunker, then enter ultra tiny multistage hierarchy system by the spiral discharging system in second surge bunker, the classified rear product 9kg that D50 is 5 μ m that finally obtains, D50 is the product 12kg of 10 μ m, D50 is the product 15kg of 15 μ m, D50 is the product 14kg of 20 μ m.
Embodiment 2:
This example utilizes successive type graphite spheroidization system on human to make graphite to carry out spheroidization and process, and produces four kinds of products that D50 is respectively 10,15,20,25 μ m.
With the ultra tiny efficient pulverizing of 100kg synthetic graphite (100 order) input system, it is 25 ± 2 μ m that regulation system pulverizing parameter makes the D50 of discharging, graphite enters the graphite spheroidization system that is comprised of 9 micro-nano granules shaping encasing systems after pulverizing, micro-nano granules shaping encasing system engine speed is 5500rpm in the system, and product 15kg, the D50 that finally obtains D50 and be 10 μ m after ultra tiny multistage hierarchy system classification is that product 27kg, the D50 of 15 μ m is that product 36kg, the D50 of 20 μ m is the product 22kg of 25 μ m.
Claims (7)
1. a graphite spheroidization method and production system thereof is characterized in that, the method may further comprise the steps:
(1) subtle powder smash
Utilize ultra tiny efficient pulverizing system that natural or electrographite are crushed to D50 and be the size-grade distribution of 1-35 μ m;
(2) Shape correction
1. batch Shape correction: the natural or electrographite after superfine grinding is dropped into a micro-nano granules shaping encasing system, under engine speed 100-9000rpm, process after 5-30 minute, obtain the natural or electrographite of spheroidization; Or
2. continuous Shape correction: through the natural or electrographite after the superfine grinding by the feeding coal of feeding machine at 50-200kg/h under in the continuous orthopedic systems that is composed in series by 2-15 platform micro-nano granules shaping encasing system of input, under engine speed 100-9000rpm, carry out shaping, the natural or electrographite after the discharge port of orthopedic systems obtains shaping continuously;
(3) ultra tiny multistage classification
To carry out the multistage series classification of high precision in ultra tiny multistage hierarchy system through the natural or electrographite after the shaping, obtaining D50 is the narrow grade spherical graphite of different specified particle diameter series among the 3-35 μ m.
2. a kind of graphite spheroidization method according to claim 1 and production system thereof is characterized in that, described natural graphite is natural scale kish.
3. a kind of graphite spheroidization method according to claim 1 and production system thereof is characterized in that, described electrographite comprises needle coke, refinery coke, carbon fiber, carbon nanotube and carbonaceous mesophase spherules.
4. a kind of graphite spheroidization method according to claim 1 and production system thereof is characterized in that, described ultra tiny efficient pulverizing system comprises eddy current mill, vibration mill, ball milling and airflow milling.
5. a kind of graphite spheroidization method according to claim 1 and production system thereof, it is characterized in that, described micro-nano granules shaping encasing system is a kind of equipment that can carry out to micro-nano granules shaping and physics coating by the exploitation of the prosperous new forms of energy in Zhejiang company limited, the shaping principle of this equipment comprises impacts shaping and two kinds of the shapings that rub, and the intensity of impact and friction shaping can be controlled by regulating engine speed and circulation passage.
6. a kind of graphite spheroidization method according to claim 1 and production system thereof is characterized in that, the rotating speed of described micro-nano granules shaping encasing system main frame can be regulated in 100-9000rpm.
7. a kind of graphite spheroidization method according to claim 1 and production system thereof is characterized in that described ultra tiny multistage hierarchy system comprises that by the 2-7 platform grading machine of Jet Classifier for Super, centrifugal classifier, eddy current type grading machine and rotor-type grading machine forms by serial or parallel connection.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904302A (en) * | 2014-02-08 | 2014-07-02 | 湛江市聚鑫新能源有限公司 | Lithium ion battery carbon negative electrode material grinding shaping technological process and production system thereof |
| CN104071775A (en) * | 2014-04-09 | 2014-10-01 | 岳梁彩 | Graphite shaping machine |
| CN104201343A (en) * | 2014-08-27 | 2014-12-10 | 宁夏共享新能源材料有限公司 | Method for reducing specific surface area of spherical graphite |
| CN105217610A (en) * | 2015-09-10 | 2016-01-06 | 连云港江利达矿产品有限公司 | A kind of spherical graphite production technique |
| CN105600778A (en) * | 2016-02-05 | 2016-05-25 | 青岛田庄恒源石墨有限公司 | Automatic device for improving tapping density of spherical graphite |
| CN106179787A (en) * | 2016-07-12 | 2016-12-07 | 安徽科达洁能股份有限公司 | Graphite is pulverized and nodularization system |
| CN106517167A (en) * | 2016-10-25 | 2017-03-22 | 成都新柯力化工科技有限公司 | Method for manufacturing graphene nanoplatelets by arranging rotary screw rod in vibrating mill and graphene nanoplatelets |
| WO2017050260A1 (en) * | 2015-09-25 | 2017-03-30 | 深圳市贝特瑞新能源材料股份有限公司 | Method for preparing composite graphite, composite graphite and lithium ion battery |
| CN107195903A (en) * | 2017-03-23 | 2017-09-22 | 广东东岛新能源股份有限公司 | A kind of lithium-ion-power cell small particle natural graphite negative electrode material and preparation method thereof |
| CN107186634A (en) * | 2017-06-22 | 2017-09-22 | 芜湖浙鑫新能源有限公司 | Low-porosity resin base grinding tool and preparation method thereof |
| CN108787004A (en) * | 2018-06-29 | 2018-11-13 | 合肥静美图文科技有限公司 | A kind of graphite multi-stage crushing thinning apparatus |
| CN110203921A (en) * | 2019-06-13 | 2019-09-06 | 广东凯金新能源科技股份有限公司 | A kind of preparation method of lithium ion battery modified natural graphite |
| CN114178032A (en) * | 2021-12-09 | 2022-03-15 | 萝北奥星新材料有限公司 | Production method of spheroidized graphite with low specific surface area |
| CN116902974A (en) * | 2023-07-28 | 2023-10-20 | 潍坊市精华粉体工程设备有限公司 | Natural crystalline flake graphite sphericizing processing system |
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| CN101850965A (en) * | 2009-11-27 | 2010-10-06 | 洛阳市冠奇工贸有限责任公司 | Spherical graphite with median diameter of 11 to 16 mu m and preparation method thereof |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904302A (en) * | 2014-02-08 | 2014-07-02 | 湛江市聚鑫新能源有限公司 | Lithium ion battery carbon negative electrode material grinding shaping technological process and production system thereof |
| CN103904302B (en) * | 2014-02-08 | 2016-09-07 | 湛江市聚鑫新能源有限公司 | A kind of carbon negative electrode material of lithium ion cell grinds shaping process flow process and production system thereof |
| CN104071775A (en) * | 2014-04-09 | 2014-10-01 | 岳梁彩 | Graphite shaping machine |
| CN104071775B (en) * | 2014-04-09 | 2017-11-14 | 岳梁彩 | A kind of graphite trimmer |
| CN104201343A (en) * | 2014-08-27 | 2014-12-10 | 宁夏共享新能源材料有限公司 | Method for reducing specific surface area of spherical graphite |
| CN105217610A (en) * | 2015-09-10 | 2016-01-06 | 连云港江利达矿产品有限公司 | A kind of spherical graphite production technique |
| WO2017050260A1 (en) * | 2015-09-25 | 2017-03-30 | 深圳市贝特瑞新能源材料股份有限公司 | Method for preparing composite graphite, composite graphite and lithium ion battery |
| CN105600778A (en) * | 2016-02-05 | 2016-05-25 | 青岛田庄恒源石墨有限公司 | Automatic device for improving tapping density of spherical graphite |
| CN106179787A (en) * | 2016-07-12 | 2016-12-07 | 安徽科达洁能股份有限公司 | Graphite is pulverized and nodularization system |
| CN106179787B (en) * | 2016-07-12 | 2018-06-12 | 安徽科达洁能股份有限公司 | Graphite crushes and nodularization system |
| CN106517167A (en) * | 2016-10-25 | 2017-03-22 | 成都新柯力化工科技有限公司 | Method for manufacturing graphene nanoplatelets by arranging rotary screw rod in vibrating mill and graphene nanoplatelets |
| CN107195903A (en) * | 2017-03-23 | 2017-09-22 | 广东东岛新能源股份有限公司 | A kind of lithium-ion-power cell small particle natural graphite negative electrode material and preparation method thereof |
| CN107195903B (en) * | 2017-03-23 | 2020-04-07 | 广东东岛新能源股份有限公司 | Small-particle-size natural graphite negative electrode material for lithium ion power battery and preparation method thereof |
| CN107186634A (en) * | 2017-06-22 | 2017-09-22 | 芜湖浙鑫新能源有限公司 | Low-porosity resin base grinding tool and preparation method thereof |
| CN108787004A (en) * | 2018-06-29 | 2018-11-13 | 合肥静美图文科技有限公司 | A kind of graphite multi-stage crushing thinning apparatus |
| CN110203921A (en) * | 2019-06-13 | 2019-09-06 | 广东凯金新能源科技股份有限公司 | A kind of preparation method of lithium ion battery modified natural graphite |
| CN114178032A (en) * | 2021-12-09 | 2022-03-15 | 萝北奥星新材料有限公司 | Production method of spheroidized graphite with low specific surface area |
| CN116902974A (en) * | 2023-07-28 | 2023-10-20 | 潍坊市精华粉体工程设备有限公司 | Natural crystalline flake graphite sphericizing processing system |
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Application publication date: 20130306 |